Quarterly report pursuant to Section 13 or 15(d)

Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details)

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Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details) - USD ($)
1 Months Ended 3 Months Ended
Jan. 31, 2022
May 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Debt Instrument [Line Items]          
Principal balance outstanding     $ 2,200,000,000   $ 2,400,000,000
Repayment of revolving credit facility and money market loans     88,000,000 $ 33,000,000  
Escrow Deposit     $ 14,193,000   12,817,000
Port Imperial South 4/5 Garage [Member]          
Debt Instrument [Line Items]          
Loan maturity date     Dec. 01, 2029    
Secured Debt [Member]          
Debt Instrument [Line Items]          
Principal balance outstanding     $ 2,118,647,000   2,252,290,000
Unamortized deferred financing costs     (9,704,000)   (11,220,000)
Total mortgages, loans payable and other obligations, net     2,108,943,000   2,241,070,000
Secured Debt [Member] | Riverhouse 9 At Port Imperia [Member]          
Debt Instrument [Line Items]          
Principal balance outstanding     $ 90,024,000   87,175,000
Loan maturity date     Dec. 19, 2022    
Maximum borrowing capacity     $ 92,000,000    
Debt Instrument, Term     1 year    
Extension fee     15.00%    
Debt Instrument, Percent Guaranteed     10.00%    
Secured Debt [Member] | Riverhouse 9 At Port Imperia [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     2.13%    
Secured Debt [Member] | Port Imperial 4/5 Hotel [Member]          
Debt Instrument [Line Items]          
Effective rate     2.13%    
Principal balance outstanding     $ 89,000,000   89,000,000
Loan maturity date     Apr. 01, 2023    
Debt Instrument, Term     6 months    
Guaranteed amount   $ 14,500,000      
Repayment of debt   $ 5,000,000      
Escrow Deposit         700,000
Secured Debt [Member] | Port Imperial 4/5 Hotel [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     3.40%    
Secured Debt [Member] | Portside At Pier One [Member]          
Debt Instrument [Line Items]          
Effective rate     3.57%    
Principal balance outstanding     $ 58,998,000   58,998,000
Secured Debt [Member] | Signature Place [Member]          
Debt Instrument [Line Items]          
Effective rate     3.74%    
Principal balance outstanding     $ 43,000,000   43,000,000
Loan maturity date     Aug. 01, 2024    
Secured Debt [Member] | Liberty Towers [Member]          
Debt Instrument [Line Items]          
Effective rate     3.37%    
Principal balance outstanding     $ 265,000,000   265,000,000
Secured Debt [Member] | Haus 25 [Member]          
Debt Instrument [Line Items]          
Principal balance outstanding     $ 269,083,000   255,453,000
Loan maturity date     Dec. 01, 2024    
Maximum borrowing capacity     $ 300,000,000    
Debt Instrument, Term     1 year    
Extension fee     25.00%    
Secured Debt [Member] | Haus 25 [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     2.70%    
Secured Debt [Member] | Haus 25 [Member] | Minimum [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     2.00%    
Secured Debt [Member] | Portside 5/6 [Member]          
Debt Instrument [Line Items]          
Effective rate     4.56%    
Principal balance outstanding     $ 97,000,000   97,000,000
Loan maturity date     Mar. 10, 2026    
Debt Instrument, Percent Guaranteed     10.00%    
Secured Debt [Member] | BLVD 425 [Member]          
Debt Instrument [Line Items]          
Effective rate     4.17%    
Principal balance outstanding     $ 131,000,000   131,000,000
Loan maturity date     Aug. 10, 2026    
Secured Debt [Member] | BLVD 401 [Member]          
Debt Instrument [Line Items]          
Effective rate     4.29%    
Principal balance outstanding     $ 117,000,000   117,000,000
Loan maturity date     Aug. 10, 2026    
Secured Debt [Member] | 101 Hudson Street [Member]          
Debt Instrument [Line Items]          
Effective rate     3.20%    
Principal balance outstanding     $ 250,000,000   250,000,000
Secured Debt [Member] | Upton [Member]          
Debt Instrument [Line Items]          
Principal balance outstanding     $ 75,000,000   75,000,000
Loan maturity date     Oct. 27, 2026    
Debt Instrument, Face Amount     $ 75,000,000    
Secured Debt [Member] | Upton [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     1.58%    
Secured Debt [Member] | 145 Front at City Square [Member]          
Debt Instrument [Line Items]          
Principal balance outstanding     $ 63,000,000   63,000,000
Loan maturity date     Dec. 10, 2026    
Secured Debt [Member] | 145 Front at City Square [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     1.84%    
Secured Debt [Member] | Quarry Place At Tuckahoe [Member]          
Debt Instrument [Line Items]          
Effective rate     4.48%    
Principal balance outstanding     $ 41,000,000   41,000,000
Loan maturity date     Aug. 05, 2027    
Secured Debt [Member] | Monaco (BLVD 495 N/S) [Member]          
Debt Instrument [Line Items]          
Effective rate     2.91%    
Principal balance outstanding     $ 165,000,000   165,000,000
Loan maturity date     Nov. 10, 2027    
Secured Debt [Member] | Riverhouse 11 at Port Imperial [Member]          
Debt Instrument [Line Items]          
Effective rate     4.52%    
Principal balance outstanding     $ 100,000,000   100,000,000
Loan maturity date     Jan. 10, 2029    
Secured Debt [Member] | Soho Lofts [Member]          
Debt Instrument [Line Items]          
Effective rate     3.77%    
Principal balance outstanding     $ 160,000,000   160,000,000
Loan maturity date     Jul. 01, 2029    
Secured Debt [Member] | Soho Lofts [Member] | LIBOR [Member]          
Debt Instrument [Line Items]          
Variable Interest Rate     2.75%    
Secured Debt [Member] | 111 River St. [Member]          
Debt Instrument [Line Items]          
Effective rate     3.90%    
Principal balance outstanding         150,000,000
Closing costs to defease loan $ 6,300,000        
Secured Debt [Member] | Port Imperial South 9 [Member]          
Debt Instrument [Line Items]          
Effective rate     3.90%    
Secured Debt [Member] | Short Hills Residential [Member]          
Debt Instrument [Line Items]          
Effective rate     3.20%    
Loan maturity date     Oct. 11, 2026    
Secured Debt [Member] | 250 Johnson Road [Member]          
Debt Instrument [Line Items]          
Effective rate     3.57%    
Loan maturity date     Aug. 01, 2023    
Secured Debt [Member] | The Charlotte [Member]          
Debt Instrument [Line Items]          
Effective rate     3.37%    
Loan maturity date     Oct. 01, 2024    
Secured Debt [Member] | Worcester [Member]          
Debt Instrument [Line Items]          
Effective rate     1.58%    
Secured Debt [Member] | Port Imperial South 4/5 Garage [Member]          
Debt Instrument [Line Items]          
Effective rate     4.85%    
Principal balance outstanding     $ 32,542,000   32,664,000
Deferred interest     $ 800,000    
Secured Debt [Member] | Emery At Overlook Ridge [Member]          
Debt Instrument [Line Items]          
Effective rate     3.21%    
Principal balance outstanding     $ 72,000,000   $ 72,000,000
Loan maturity date     Jan. 01, 2031